An air$-$conditioning repair department manager has compiled data on the primary reason for $41$ service calls for the previous week, as shown in the table.

$\backslash$table$[[\backslash$table$[[$Job$],[$Number$]],\backslash$table$[[$Problem$/],[$Customer Type$]],\backslash$table$[[$Job$],[$Number$]],\backslash$table$[[$Problem$/],[$Customer Type$]],\backslash$table$[[$Job$],[$Number$]],\backslash$table$[[$Problem$/],[$Customer Type$]]],[301,$F$/$R$,315,$F$/$C$,329,$O$/$C$],[302,$O$/$R$,316,$O$/$C$,330,$N$/$R$],[303,$N$/$C$,317,$W$/$C$,331,$N$/$R$],[304,$N$/$R$,318,$N$/$R$,332,$W$/$R$],[305,$W$/$C$,319,\frac{0}{C},333,\frac{0}{R}$